Use FreeRTOS (simple, easy, robust, & optimised for the Arduino IDE) to reduce the power required for battery or low power applications.

FreeRTOS, simple, easy, robust, and optimised for Arduino IDE. Using FreeRTOS Semaphores to share and protect physical resources.

A quick and simple lesson on making a screw shield for the Arduino Pro Mini!

Gizmo to measure the running speed of the shutter on a film camera